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LM5168FDDAR

更新时间： 2022-05-14 22:22:15
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
38页 2645K
描述
LM5169/LM5168 0.65-A/0.3-A, 120-V, Step-Down Converter with Fly-Buck™ Converter Capability

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LM5168FDDAR 数据手册

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LM5168  
SNVSBS7 – DECEMBER 2021  
LM5169/LM5168 0.65-A/0.3-A, 120-V, Step-Down Converter with Fly-Buck™ Converter  
Capability  
1 Features  
3 Description  
•
Designed for reliability in rugged applications  
– Wide input voltage range of 6 V to 120 V  
– Junction temperature range: –40°C to +150°C  
– Fixed 3-ms internal soft-start timer  
– Peak and valley current-limit protection  
– Input UVLO and thermal shutdown protection  
Suited for scalable industrial power supplies and  
battery packs  
– Low minimum on and off times of 50 ns  
– Adjustable switching frequency up to 1 MHz  
– Diode emulation for high light-load efficiency  
– Auto mode with low quiescent current (< 10 µA)  
– FPWM mode enables fly-buck capability  
– 3-µA shutdown quiescent current  
The LM5169 and LM5168 synchronous buck  
converters are designed to regulate over a wide input  
voltage range, minimizing the need for external surge  
suppression components. A minimum controllable on  
time of 50 ns facilitates large step-down conversion  
ratios, enabling the direct step-down from a 48-V  
nominal input to low-voltage rails for reduced system  
complexity and solution cost. The LM5169 operates  
during input voltage dips as low as 6 V, at nearly  
100% duty cycle if needed, making it an excellent  
choice for wide input supply range industrial and high  
cell count battery pack applications.  
•
With integrated high-side and low-side power  
MOSFETs, the LM5169 delivers up to 0.65-A of  
output current and the LM5168 delivers up to 0.3-  
A of output current. A constant on-time (COT)  
control architecture provides nearly constant switching  
frequency with excellent load and line transient  
response. The LM5169 is available in FPWM or auto  
mode operation. FPWM mode provides forced CCM  
operation across the entire load range supporting  
isolated fly-buck operation. Auto mode enables ultra-  
low IQ and diode emulation mode operation for high  
light-load efficiency.  
– Pin-to-pin compatible with LM5164, LM5163,  
LM5017, and LM34927  
Integration reduces solution size and cost  
•
– COT mode control architecture  
– Integrated 1.9-Ω NFET buck switch  
– Integrated 0.71-Ω NFET synchronous rectifier  
– 1.2-V internal voltage reference  
– No loop compensation components  
– Internal VCC bias regulator and boot diode  
– Open-drain power-good indicator  
– 8-pin SOIC package with PowerPAD™ with  
30°C/W RθJA (EVM)  
Device Information  
PART NUMBER  
LM5169(2)  
PACKAGE(1)  
BODY SIZE (NOM)  
2 Applications  
SO PowerPAD (8)  
4.89 mm × 3.90 mm  
•
•
•
Communications – brick power module  
Industrial battery pack (≥ 10 S)  
Battery pack – e-bike/e-scooter/LEV  
LM5168  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
(2) Preview  
D1  
LO  
VIN  
VOUT  
VOUT2  
VIN  
SW  
COUT2  
CA  
RA  
CBST  
CIN  
RFB1  
EN/UVLO  
RT  
BST  
FB  
T1  
VIN  
VOUT1  
COUT  
CB  
VIN  
SW  
CA  
RA  
CBST  
CIN  
RFB1  
EN/UVLO  
RT  
BST  
FB  
RT  
RFB2  
COUT1  
CB  
PGOOD  
GND  
RT  
RFB2  
GND  
PGOOD  
Typical Buck Application Circuit  
Typical Fly-Buck Application Circuit  
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 
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